Question

hyy.... solve it I will mark

Answer 1

the angles inside the triangle are 6x,180-9x,180-9x

sum of all angles in a triangle are 180

6x+180-9x+180-9x=180

12x=180

x=180/12=15

Answer 2

given angles inside the triangle is 6x
but from the fig we can write it as 180-9x
is one of the interior angle so
6x+180-9x+180-9x=180
-12x =-180
x=180/12
=15